使用 API Google Admin-sdk 创建用户时出错

我有以下代码，用于获取邮件列表等信息...但是当我尝试创建新邮件（用户）时，出现以下错误，希望您能帮助我，我试图查找更多信息，但只找到旧的 api。这是错误>： https://i.stack.imgur.com/ZBoqa.png

C:'xampp'php>php -f "c:'Users'Eldelaguila77'Desktop'proyectocorreos'quickstart1.php"
Error calling POST https://www.googleapis.com/admin/directory/v1/users: (403) Insufficient Permission

这是我的代码

<?php
    require __DIR__ . '/vendor/autoload.php';
    define('APPLICATION_NAME', 'Directory API PHP Quickstart');
    define('CREDENTIALS_PATH', '~/.credentials/admin-directory_v1-php-quickstart.json');
    define('CLIENT_SECRET_PATH', __DIR__ . '/client_secret1.json');
    // If modifying these scopes, delete your previously saved credentials
    // at ~/.credentials/admin-directory_v1-php-quickstart.json
    define('SCOPES', implode(' ', array(
      //Google_Service_Directory::ADMIN_DIRECTORY_USER_READONLY)
      Google_Service_Directory::ADMIN_DIRECTORY_USER)
    ));
    if (php_sapi_name() != 'cli') {
      throw new Exception('This application must be run on the command line.');
    }
    /**
     * Returns an authorized API client.
     * @return Google_Client the authorized client object
     */
    function getClient() {
      $client = new Google_Client();
      $client->setApplicationName(APPLICATION_NAME);
      $client->setScopes(SCOPES);
      $client->setAuthConfigFile(CLIENT_SECRET_PATH);
      $client->setAccessType('offline');
      // Load previously authorized credentials from a file.
      $credentialsPath = expandHomeDirectory(CREDENTIALS_PATH);
      if (file_exists($credentialsPath)) {
        $accessToken = file_get_contents($credentialsPath);
      } else {
        // Request authorization from the user.
        $authUrl = $client->createAuthUrl();
        printf("Open the following link in your browser:'n%s'n", $authUrl);
        print 'Enter verification code: ';
        $authCode = trim(fgets(STDIN));
        // Exchange authorization code for an access token.
        $accessToken = $client->authenticate($authCode);
        // Store the credentials to disk.
        if(!file_exists(dirname($credentialsPath))) {
          mkdir(dirname($credentialsPath), 777, true);
        }
        file_put_contents($credentialsPath, $accessToken);
        printf("Credentials saved to %s'n", $credentialsPath);
      }
      $client->setAccessToken($accessToken);
      // Refresh the token if it's expired.
      if ($client->isAccessTokenExpired()) {
        $client->refreshToken($client->getRefreshToken());
        file_put_contents($credentialsPath, $client->getAccessToken());
      }
      return $client;
    }
    /**
     * Expands the home directory alias '~' to the full path.
     * @param string $path the path to expand.
     * @return string the expanded path.
     */
    function expandHomeDirectory($path) {
      $homeDirectory = getenv('HOME');
      if (empty($homeDirectory)) {
        $homeDirectory = getenv("HOMEDRIVE") . getenv("HOMEPATH");
      }
      return str_replace('~', realpath($homeDirectory), $path);
    }
    // Get the API client and construct the service object.
    $client = getClient();
    $service = new Google_Service_Directory($client);
    //enviar creacion de usuario
    $user = new Google_Service_Directory_User();
    $name = new Google_Service_Directory_UserName();
    // SET THE ATTRIBUTES
    $name->setGivenName('pruebanueve');
    $name->setFamilyName('Testerton');
    $user->setName($name);
    $user->setHashFunction("MD5");
    $user->setPrimaryEmail("prueba@dom.com");
    $user->setPassword(hash("md5","holamundo"));

    try 
    { 
        $createUserResult = $service -> users -> insert($user); 
        var_dump($createUserResult); 
    } 
    catch (Google_IO_Exception $gioe) 
    { 
        echo "Error in connection: ".$gioe->getMessage(); 
    } 
    catch (Google_Service_Exception $gse) 
    { 
        echo $gse->getMessage(); 
    } 
    //print $results;

    // Print the first 10 users in the domain.
    /*$optParams = array(
      'customer' => 'my_customer',
      'maxResults' => 10,
      'orderBy' => 'email',
    );
    $results = $service->users->listUsers($optParams);
    if (count($results->getUsers()) == 0) {
      print "No users found.'n";
    } else {
      print "Users:'n";
      foreach ($results->getUsers() as $user) {
        printf("%s (%s) (%s) 'n", $user->getPrimaryEmail(),
            $user->getName()->getFullName(),
            $user->getlastLoginTime());
      }
    }*/
    ?>